Steel Dynamics, Inc.
GB ˙ LSE ˙ US8581191009
SecurityGB:0ADX / Steel Dynamics, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership20,874 shares
Latest Disclosed Value $ 3,758,259
Janus Henderson Group Plc ownership in 0ADX / Steel Dynamics, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 20,874 shares of Steel Dynamics, Inc. (GB:0ADX) valued at $3,758,259 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 17,210 shares of Steel Dynamics, Inc.. This represents a change in shares of 21.29% during the quarter.

Janus Henderson Group Plc has a history of taking positions in derivatives of the underlying security (0ADX) in the form of stock options.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

GB:0ADX / Steel Dynamics, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-18 2026-03-31 13F/A-1 STEEL DYNAMICS COM 858119100 20,874 3,664 21.29 3,758 28.92 0.0006
2026-05-15 2026-03-31 13F STEEL DYNAMICS COM 858119100 20,874 3,664 21.29 3,758 28.92 0.0007
2026-02-17 2025-12-31 13F STEEL DYNAMICS COM 858119100 17,210 -1,847 -9.69 2,916 9.71 0.0013
2025-11-14 2025-09-30 13F STEEL DYNAMICS COM 858119100 19,057 -260 -1.35 2,657 7.48 0.0012
2025-08-14 2025-06-30 13F STEEL DYNAMICS COM 858119100 19,317 4,407 29.56 2,473 33.77 0.0012
2025-05-15 2025-03-31 13F STEEL DYNAMICS COM 858119100 14,910 -4,532 -23.31 1,848 -16.64 0.0010
2025-02-14 2024-12-31 13F STEEL DYNAMICS COM 858119100 19,442 -1,775 -8.37 2,217 -17.09 0.0011
2024-11-14 2024-09-30 13F STEEL DYNAMICS COM 858119100 21,217 0 0.00 2,675 -2.69 0.0014
2024-08-14 2024-06-30 13F STEEL DYNAMICS COM 858119100 21,217 -2,585 -10.86 2,748 -22.11 0.0015
2024-05-15 2024-03-31 13F STEEL DYNAMICS COM 858119100 23,802 -17 -0.07 3,529 25.42 0.0019
2024-02-14 2023-12-31 13F STEEL DYNAMICS COM 858119100 23,819 -1,622 -6.38 2,813 3.15 0.0017
2023-11-14 2023-09-30 13F STEEL DYNAMICS COM 858119100 25,441 1,157 4.76 2,728 3.14 0.0018
2023-08-14 2023-06-30 13F STEEL DYNAMICS COM 858119100 24,284 -2,258 -8.51 2,645 -11.90 0.0016
2023-05-15 2023-03-31 13F STEEL DYNAMICS COM 858119100 26,542 5,043 23.46 3,002 42.90 0.0020
2023-02-14 2022-12-31 13F STEEL DYNAMICS COM 858119100 21,499 -2 -0.01 2,100 37.70 0.0015
2023-01-13 2022-09-30 13F/A-1 STEEL DYNAMICS COM 858119100 21,501 -2,393 -10.02 1,525 -3.54 0.0011
2022-11-14 2022-09-30 13F STEEL DYNAMICS COM 858119100 21,501 -2,393 1,525 0.0011
2022-08-15 2022-06-30 13F STEEL DYNAMICS COM 858119100 23,894 -57,229 -70.55 1,581 -76.64 0.0011
2022-05-16 2022-03-31 13F STEEL DYNAMICS COM 858119100 81,123 47,814 143.55 6,768 227.43 0.0033
2022-02-14 2021-12-31 13F STEEL DYNAMICS COM 858119100 33,309 -11,057 -24.92 2,067 -20.35 0.0009
2021-11-16 2021-09-30 13F STEEL DYNAMICS COM 858119100 44,366 -4,667 -9.52 2,595 -11.22 0.0011
2021-08-16 2021-06-30 13F STEEL DYNAMICS COM 858119100 49,033 -8,175 -14.29 2,923 0.65 0.0013
2021-05-17 2021-03-31 13F STEEL DYNAMICS COM 858119100 57,208 10,498 22.47 2,904 68.64 0.0013
2021-02-16 2020-12-31 13F STEEL DYNAMICS COM 858119100 46,710 927 2.02 1,722 31.35 0.0008
2020-11-16 2020-09-30 13F STEEL DYNAMICS COM 858119100 45,783 3,078 7.21 1,311 17.68 0.0007
2020-08-14 2020-06-30 13F STEEL DYNAMICS COM 858119100 42,705 -15,095 -26.12 1,114 -14.44 0.0006
2020-05-14 2020-03-31 13F STEEL DYNAMICS COM 858119100 57,800 -49,031 -45.90 1,302 -64.20 0.0009
2020-02-18 2019-12-31 13F STEEL DYNAMICS COM 858119100 106,831 -17,141 -13.83 3,637 -1.57 0.0019
2019-11-14 2019-09-30 13F STEEL DYNAMICS COM 858119100 123,972 1,008 0.82 3,695 -0.51 0.0020
2019-07-31 2019-06-30 13F STEEL DYNAMICS COM 858119100 122,964 38,119 44.93 3,714 24.13 0.0020
2019-04-30 2019-03-31 13F STEEL DYNAMICS COM 858119100 84,845 -82,367 -49.26 2,992 -40.43 0.0017
2019-02-06 2018-12-31 13F STEEL DYNAMICS COM 858119100 167,212 -478,080 -74.09 5,023 -82.77 0.0032
2018-11-09 2018-09-30 13F STEEL DYNAMICS COM 858119100 645,292 452,921 235.44 29,161 229.88 0.0156
2018-08-10 2018-06-30 13F STEEL DYNAMICS COM 858119100 192,371 138,400 256.43 8,840 270.49 0.0050
2018-05-14 2018-03-31 13F STEEL DYNAMICS COM 858119100 53,971 24,600 83.76 2,386 88.32 0.0014
2018-03-12 2017-12-31 13F/A-1 STEEL DYNAMICS COM 858119100 29,371 -13,460 -31.43 1,267 -14.22 0.0008
2018-02-09 2017-12-31 13F STEEL DYNAMICS COM 858119100 29,371 -13,460 1,267
2017-11-14 2017-09-30 13F STEEL DYNAMICS COM 858119100 42,831 -131,700 -75.46 1,477 -76.37 0.0009
2017-08-17 2017-06-30 13F/A-1 STEEL DYNAMICS COM 858119100 174,531 174,531 6,250 0.0043
2017-08-14 2017-06-30 13F STEEL DYNAMICS COM 858119100 174,531 6,250 0.0043
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-08-14 2025-06-30 13F STEEL DYNAMICS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F STEEL DYNAMICS COM Put 8,747 1,084 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.